Glen posted an illustration of a cover with a label on the reverse.
Another important point on this cover falls within what we might be able to archive in this thread.
In private emails with Glen he reminded me of a few facts and I will restate these here ...
it would appear that King Edward 8 stamps used during this period are less common than any other period of use.
King Edward 8 had abdicated the throne in December 1936
He had just been stripped of his title "Royal Highness" on March 8 1937 - in the very first official act of his brother KGVI, who felt he did not deserve by his actions to marry a twice divorcee, to warrant that title any longer.
So, for this very brief period of March 8 1937 until May 9 1937 when the KGVI stamps were issued, the UK stamps bearing the image of the "Monarch" were the only ones in British history where that person was NOT at that time, styled "Royal Highness"
First day covers and covers dated on the abdication date turn up - as do 10 May cover showing the three Kings (George 5, Edward 8 and George 6) as do Coronation day covers (again showing the 3 Kings) dated the 13 May 1937 - but this period in between seems to be a bit of a void - probably as the public were a bit miffed that he chose this woman over their country.
So the idea here is to record the stamps of King Edward 8 used between the 8 March and the 9 May 1937
This may give us an idea of the quantity and quality of those that exist and at the same time, with these being regarded as cheap covers may enable some finds by members here (or they may already have a few and have not seen them for what they are) ..
Before I dig out my book to see what I have lurking I would like to request that Glen post the image of the cover in question onto this thread as well and if there is anything I have left out in the text above - if he could put it right ..